1 // SPDX-License-Identifier: GPL-2.0-or-later
4 * Linux MegaRAID device driver
6 * Copyright (c) 2003-2004 LSI Logic Corporation.
9 * Version : v2.20.2.7 (Jul 16 2006)
11 * Common management module
13 #include <linux/sched.h>
14 #include <linux/slab.h>
15 #include <linux/mutex.h>
16 #include "megaraid_mm.h"
19 // Entry points for char node driver
20 static DEFINE_MUTEX(mraid_mm_mutex);
21 static int mraid_mm_open(struct inode *, struct file *);
22 static long mraid_mm_unlocked_ioctl(struct file *, uint, unsigned long);
25 // routines to convert to and from the old the format
26 static int mimd_to_kioc(mimd_t __user *, mraid_mmadp_t *, uioc_t *);
27 static int kioc_to_mimd(uioc_t *, mimd_t __user *);
31 static int handle_drvrcmd(void __user *, uint8_t, int *);
32 static int lld_ioctl(mraid_mmadp_t *, uioc_t *);
33 static void ioctl_done(uioc_t *);
34 static void lld_timedout(struct timer_list *);
35 static void hinfo_to_cinfo(mraid_hba_info_t *, mcontroller_t *);
36 static mraid_mmadp_t *mraid_mm_get_adapter(mimd_t __user *, int *);
37 static uioc_t *mraid_mm_alloc_kioc(mraid_mmadp_t *);
38 static void mraid_mm_dealloc_kioc(mraid_mmadp_t *, uioc_t *);
39 static int mraid_mm_attach_buf(mraid_mmadp_t *, uioc_t *, int);
40 static int mraid_mm_setup_dma_pools(mraid_mmadp_t *);
41 static void mraid_mm_free_adp_resources(mraid_mmadp_t *);
42 static void mraid_mm_teardown_dma_pools(mraid_mmadp_t *);
44 MODULE_AUTHOR("LSI Logic Corporation");
45 MODULE_DESCRIPTION("LSI Logic Management Module");
46 MODULE_LICENSE("GPL");
47 MODULE_VERSION(LSI_COMMON_MOD_VERSION);
49 static int dbglevel = CL_ANN;
50 module_param_named(dlevel, dbglevel, int, 0);
51 MODULE_PARM_DESC(dlevel, "Debug level (default=0)");
53 EXPORT_SYMBOL(mraid_mm_register_adp);
54 EXPORT_SYMBOL(mraid_mm_unregister_adp);
55 EXPORT_SYMBOL(mraid_mm_adapter_app_handle);
57 static uint32_t drvr_ver = 0x02200207;
59 static int adapters_count_g;
60 static struct list_head adapters_list_g;
62 static wait_queue_head_t wait_q;
64 static const struct file_operations lsi_fops = {
65 .open = mraid_mm_open,
66 .unlocked_ioctl = mraid_mm_unlocked_ioctl,
67 .compat_ioctl = compat_ptr_ioctl,
69 .llseek = noop_llseek,
72 static struct miscdevice megaraid_mm_dev = {
73 .minor = MISC_DYNAMIC_MINOR,
79 * mraid_mm_open - open routine for char node interface
83 * Allow ioctl operations by apps only if they have superuser privilege.
86 mraid_mm_open(struct inode *inode, struct file *filep)
89 * Only allow superuser to access private ioctl interface
91 if (!capable(CAP_SYS_ADMIN)) return (-EACCES);
97 * mraid_mm_ioctl - module entry-point for ioctls
98 * @filep : file operations pointer (ignored)
99 * @cmd : ioctl command
100 * @arg : user ioctl packet
103 mraid_mm_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
106 char signature[EXT_IOCTL_SIGN_SZ] = {0};
111 void __user *argp = (void __user *)arg;
114 * Make sure only USCSICMD are issued through this interface.
115 * MIMD application would still fire different command.
118 if ((_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD)) {
123 * Look for signature to see if this is the new or old ioctl format.
125 if (copy_from_user(signature, argp, EXT_IOCTL_SIGN_SZ)) {
126 con_log(CL_ANN, (KERN_WARNING
127 "megaraid cmm: copy from usr addr failed\n"));
131 if (memcmp(signature, EXT_IOCTL_SIGN, EXT_IOCTL_SIGN_SZ) == 0)
137 * At present, we don't support the new ioctl packet
143 * If it is a driver ioctl (as opposed to fw ioctls), then we can
144 * handle the command locally. rval > 0 means it is not a drvr cmd
146 rval = handle_drvrcmd(argp, old_ioctl, &drvrcmd_rval);
154 if ((adp = mraid_mm_get_adapter(argp, &rval)) == NULL) {
159 * Check if adapter can accept ioctl. We may have marked it offline
160 * if any previous kioc had timedout on this controller.
162 if (!adp->quiescent) {
163 con_log(CL_ANN, (KERN_WARNING
164 "megaraid cmm: controller cannot accept cmds due to "
165 "earlier errors\n" ));
170 * The following call will block till a kioc is available
171 * or return NULL if the list head is empty for the pointer
172 * of type mraid_mmapt passed to mraid_mm_alloc_kioc
174 kioc = mraid_mm_alloc_kioc(adp);
179 * User sent the old mimd_t ioctl packet. Convert it to uioc_t.
181 if ((rval = mimd_to_kioc(argp, adp, kioc))) {
182 mraid_mm_dealloc_kioc(adp, kioc);
186 kioc->done = ioctl_done;
189 * Issue the IOCTL to the low level driver. After the IOCTL completes
190 * release the kioc if and only if it was _not_ timedout. If it was
191 * timedout, that means that resources are still with low level driver.
193 if ((rval = lld_ioctl(adp, kioc))) {
196 mraid_mm_dealloc_kioc(adp, kioc);
202 * Convert the kioc back to user space
204 rval = kioc_to_mimd(kioc, argp);
207 * Return the kioc to free pool
209 mraid_mm_dealloc_kioc(adp, kioc);
215 mraid_mm_unlocked_ioctl(struct file *filep, unsigned int cmd,
220 mutex_lock(&mraid_mm_mutex);
221 err = mraid_mm_ioctl(filep, cmd, arg);
222 mutex_unlock(&mraid_mm_mutex);
228 * mraid_mm_get_adapter - Returns corresponding adapters for the mimd packet
229 * @umimd : User space mimd_t ioctl packet
230 * @rval : returned success/error status
232 * The function return value is a pointer to the located @adapter.
234 static mraid_mmadp_t *
235 mraid_mm_get_adapter(mimd_t __user *umimd, int *rval)
237 mraid_mmadp_t *adapter;
243 if (copy_from_user(&mimd, umimd, sizeof(mimd_t))) {
248 adapno = GETADAP(mimd.ui.fcs.adapno);
250 if (adapno >= adapters_count_g) {
259 list_for_each_entry(adapter, &adapters_list_g, list) {
260 if (iterator++ == adapno) {
275 * handle_drvrcmd - Checks if the opcode is a driver cmd and if it is, handles it.
276 * @arg : packet sent by the user app
277 * @old_ioctl : mimd if 1; uioc otherwise
278 * @rval : pointer for command's returned value (not function status)
281 handle_drvrcmd(void __user *arg, uint8_t old_ioctl, int *rval)
283 mimd_t __user *umimd;
300 if (copy_from_user(&kmimd, umimd, sizeof(mimd_t)))
303 opcode = kmimd.ui.fcs.opcode;
304 subopcode = kmimd.ui.fcs.subopcode;
307 * If the opcode is 0x82 and the subopcode is either GET_DRVRVER or
308 * GET_NUMADP, then we can handle. Otherwise we should return 1 to
309 * indicate that we cannot handle this.
316 case MEGAIOC_QDRVRVER:
318 if (copy_to_user(kmimd.data, &drvr_ver, sizeof(uint32_t)))
325 *rval = adapters_count_g;
327 if (copy_to_user(kmimd.data, &adapters_count_g,
343 * mimd_to_kioc - Converter from old to new ioctl format
344 * @umimd : user space old MIMD IOCTL
345 * @adp : adapter softstate
346 * @kioc : kernel space new format IOCTL
348 * Routine to convert MIMD interface IOCTL to new interface IOCTL packet. The
349 * new packet is in kernel space so that driver can perform operations on it
354 mimd_to_kioc(mimd_t __user *umimd, mraid_mmadp_t *adp, uioc_t *kioc)
358 mraid_passthru_t *pthru32;
364 if (copy_from_user(&mimd, umimd, sizeof(mimd_t)))
368 * Applications are not allowed to send extd pthru
370 if ((mimd.mbox[0] == MBOXCMD_PASSTHRU64) ||
371 (mimd.mbox[0] == MBOXCMD_EXTPTHRU))
374 opcode = mimd.ui.fcs.opcode;
375 subopcode = mimd.ui.fcs.subopcode;
376 adapno = GETADAP(mimd.ui.fcs.adapno);
378 if (adapno >= adapters_count_g)
381 kioc->adapno = adapno;
382 kioc->mb_type = MBOX_LEGACY;
383 kioc->app_type = APPTYPE_MIMD;
389 if (subopcode == MEGAIOC_QADAPINFO) {
391 kioc->opcode = GET_ADAP_INFO;
392 kioc->data_dir = UIOC_RD;
393 kioc->xferlen = sizeof(mraid_hba_info_t);
395 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
399 con_log(CL_ANN, (KERN_WARNING
400 "megaraid cmm: Invalid subop\n"));
408 kioc->opcode = MBOX_CMD;
409 kioc->xferlen = mimd.ui.fcs.length;
410 kioc->user_data_len = kioc->xferlen;
411 kioc->user_data = mimd.ui.fcs.buffer;
413 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
416 if (mimd.outlen) kioc->data_dir = UIOC_RD;
417 if (mimd.inlen) kioc->data_dir |= UIOC_WR;
423 kioc->opcode = MBOX_CMD;
424 kioc->xferlen = (mimd.outlen > mimd.inlen) ?
425 mimd.outlen : mimd.inlen;
426 kioc->user_data_len = kioc->xferlen;
427 kioc->user_data = mimd.data;
429 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
432 if (mimd.outlen) kioc->data_dir = UIOC_RD;
433 if (mimd.inlen) kioc->data_dir |= UIOC_WR;
442 * If driver command, nothing else to do
448 * This is a mailbox cmd; copy the mailbox from mimd
450 mbox64 = (mbox64_t *)((unsigned long)kioc->cmdbuf);
451 mbox = &mbox64->mbox32;
452 memcpy(mbox, mimd.mbox, 14);
454 if (mbox->cmd != MBOXCMD_PASSTHRU) { // regular DCMD
456 mbox->xferaddr = (uint32_t)kioc->buf_paddr;
458 if (kioc->data_dir & UIOC_WR) {
459 if (copy_from_user(kioc->buf_vaddr, kioc->user_data,
469 * This is a regular 32-bit pthru cmd; mbox points to pthru struct.
470 * Just like in above case, the beginning for memblk is treated as
471 * a mailbox. The passthru will begin at next 1K boundary. And the
472 * data will start 1K after that.
474 pthru32 = kioc->pthru32;
475 kioc->user_pthru = &umimd->pthru;
476 mbox->xferaddr = (uint32_t)kioc->pthru32_h;
478 if (copy_from_user(pthru32, kioc->user_pthru,
479 sizeof(mraid_passthru_t))) {
483 pthru32->dataxferaddr = kioc->buf_paddr;
484 if (kioc->data_dir & UIOC_WR) {
485 if (pthru32->dataxferlen > kioc->xferlen)
487 if (copy_from_user(kioc->buf_vaddr, kioc->user_data,
488 pthru32->dataxferlen)) {
497 * mraid_mm_attach_buf - Attach a free dma buffer for required size
498 * @adp : Adapter softstate
499 * @kioc : kioc that the buffer needs to be attached to
500 * @xferlen : required length for buffer
502 * First we search for a pool with smallest buffer that is >= @xferlen. If
503 * that pool has no free buffer, we will try for the next bigger size. If none
504 * is available, we will try to allocate the smallest buffer that is >=
505 * @xferlen and attach it the pool.
508 mraid_mm_attach_buf(mraid_mmadp_t *adp, uioc_t *kioc, int xferlen)
515 kioc->pool_index = -1;
516 kioc->buf_vaddr = NULL;
521 * We need xferlen amount of memory. See if we can get it from our
522 * dma pools. If we don't get exact size, we will try bigger buffer
525 for (i = 0; i < MAX_DMA_POOLS; i++) {
527 pool = &adp->dma_pool_list[i];
529 if (xferlen > pool->buf_size)
532 if (right_pool == -1)
535 spin_lock_irqsave(&pool->lock, flags);
540 kioc->pool_index = i;
541 kioc->buf_vaddr = pool->vaddr;
542 kioc->buf_paddr = pool->paddr;
544 spin_unlock_irqrestore(&pool->lock, flags);
548 spin_unlock_irqrestore(&pool->lock, flags);
554 * If xferlen doesn't match any of our pools, return error
556 if (right_pool == -1)
560 * We did not get any buffer from the preallocated pool. Let us try
561 * to allocate one new buffer. NOTE: This is a blocking call.
563 pool = &adp->dma_pool_list[right_pool];
565 spin_lock_irqsave(&pool->lock, flags);
567 kioc->pool_index = right_pool;
569 kioc->buf_vaddr = dma_pool_alloc(pool->handle, GFP_ATOMIC,
571 spin_unlock_irqrestore(&pool->lock, flags);
573 if (!kioc->buf_vaddr)
580 * mraid_mm_alloc_kioc - Returns a uioc_t from free list
581 * @adp : Adapter softstate for this module
583 * The kioc_semaphore is initialized with number of kioc nodes in the
584 * free kioc pool. If the kioc pool is empty, this function blocks till
585 * a kioc becomes free.
588 mraid_mm_alloc_kioc(mraid_mmadp_t *adp)
591 struct list_head* head;
594 down(&adp->kioc_semaphore);
596 spin_lock_irqsave(&adp->kioc_pool_lock, flags);
598 head = &adp->kioc_pool;
600 if (list_empty(head)) {
601 up(&adp->kioc_semaphore);
602 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
604 con_log(CL_ANN, ("megaraid cmm: kioc list empty!\n"));
608 kioc = list_entry(head->next, uioc_t, list);
609 list_del_init(&kioc->list);
611 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
613 memset((caddr_t)(unsigned long)kioc->cmdbuf, 0, sizeof(mbox64_t));
614 memset((caddr_t) kioc->pthru32, 0, sizeof(mraid_passthru_t));
616 kioc->buf_vaddr = NULL;
618 kioc->pool_index =-1;
620 kioc->user_data = NULL;
621 kioc->user_data_len = 0;
622 kioc->user_pthru = NULL;
629 * mraid_mm_dealloc_kioc - Return kioc to free pool
630 * @adp : Adapter softstate
631 * @kioc : uioc_t node to be returned to free pool
634 mraid_mm_dealloc_kioc(mraid_mmadp_t *adp, uioc_t *kioc)
639 if (kioc->pool_index != -1) {
640 pool = &adp->dma_pool_list[kioc->pool_index];
642 /* This routine may be called in non-isr context also */
643 spin_lock_irqsave(&pool->lock, flags);
646 * While attaching the dma buffer, if we didn't get the
647 * required buffer from the pool, we would have allocated
648 * it at the run time and set the free_buf flag. We must
649 * free that buffer. Otherwise, just mark that the buffer is
652 if (kioc->free_buf == 1)
653 dma_pool_free(pool->handle, kioc->buf_vaddr,
658 spin_unlock_irqrestore(&pool->lock, flags);
661 /* Return the kioc to the free pool */
662 spin_lock_irqsave(&adp->kioc_pool_lock, flags);
663 list_add(&kioc->list, &adp->kioc_pool);
664 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
666 /* increment the free kioc count */
667 up(&adp->kioc_semaphore);
673 * lld_ioctl - Routine to issue ioctl to low level drvr
674 * @adp : The adapter handle
675 * @kioc : The ioctl packet with kernel addresses
678 lld_ioctl(mraid_mmadp_t *adp, uioc_t *kioc)
681 struct uioc_timeout timeout = { };
683 kioc->status = -ENODATA;
684 rval = adp->issue_uioc(adp->drvr_data, kioc, IOCTL_ISSUE);
686 if (rval) return rval;
691 if (adp->timeout > 0) {
693 timer_setup_on_stack(&timeout.timer, lld_timedout, 0);
695 timeout.timer.expires = jiffies + adp->timeout * HZ;
697 add_timer(&timeout.timer);
701 * Wait till the low level driver completes the ioctl. After this
702 * call, the ioctl either completed successfully or timedout.
704 wait_event(wait_q, (kioc->status != -ENODATA));
705 if (timeout.timer.function) {
706 del_timer_sync(&timeout.timer);
707 destroy_timer_on_stack(&timeout.timer);
711 * If the command had timedout, we mark the controller offline
714 if (kioc->timedout) {
723 * ioctl_done - callback from the low level driver
724 * @kioc : completed ioctl packet
727 ioctl_done(uioc_t *kioc)
731 mraid_mmadp_t* adapter;
735 * When the kioc returns from driver, make sure it still doesn't
736 * have ENODATA in status. Otherwise, driver will hang on wait_event
739 if (kioc->status == -ENODATA) {
740 con_log(CL_ANN, (KERN_WARNING
741 "megaraid cmm: lld didn't change status!\n"));
743 kioc->status = -EINVAL;
747 * Check if this kioc was timedout before. If so, nobody is waiting
748 * on this kioc. We don't have to wake up anybody. Instead, we just
749 * have to free the kioc
751 if (kioc->timedout) {
754 adapno = kioc->adapno;
757 con_log(CL_ANN, ( KERN_WARNING "megaraid cmm: completed "
758 "ioctl that was timedout before\n"));
760 list_for_each_entry(adapter, &adapters_list_g, list) {
761 if (iterator++ == adapno) {
770 mraid_mm_dealloc_kioc( adapter, kioc );
780 * lld_timedout - callback from the expired timer
781 * @t : timer that timed out
784 lld_timedout(struct timer_list *t)
786 struct uioc_timeout *timeout = from_timer(timeout, t, timer);
787 uioc_t *kioc = timeout->uioc;
789 kioc->status = -ETIME;
792 con_log(CL_ANN, (KERN_WARNING "megaraid cmm: ioctl timed out\n"));
799 * kioc_to_mimd - Converter from new back to old format
800 * @kioc : Kernel space IOCTL packet (successfully issued)
801 * @mimd : User space MIMD packet
804 kioc_to_mimd(uioc_t *kioc, mimd_t __user *mimd)
811 mraid_passthru_t __user *upthru32;
812 mraid_passthru_t *kpthru32;
814 mraid_hba_info_t *hinfo;
817 if (copy_from_user(&kmimd, mimd, sizeof(mimd_t)))
820 opcode = kmimd.ui.fcs.opcode;
821 subopcode = kmimd.ui.fcs.subopcode;
823 if (opcode == 0x82) {
826 case MEGAIOC_QADAPINFO:
828 hinfo = (mraid_hba_info_t *)(unsigned long)
831 hinfo_to_cinfo(hinfo, &cinfo);
833 if (copy_to_user(kmimd.data, &cinfo, sizeof(cinfo)))
845 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
847 if (kioc->user_pthru) {
849 upthru32 = kioc->user_pthru;
850 kpthru32 = kioc->pthru32;
852 if (copy_to_user(&upthru32->scsistatus,
853 &kpthru32->scsistatus,
859 if (kioc->user_data) {
860 if (copy_to_user(kioc->user_data, kioc->buf_vaddr,
861 kioc->user_data_len)) {
866 if (copy_to_user(&mimd->mbox[17],
867 &mbox64->mbox32.status, sizeof(uint8_t))) {
876 * hinfo_to_cinfo - Convert new format hba info into old format
877 * @hinfo : New format, more comprehensive adapter info
878 * @cinfo : Old format adapter info to support mimd_t apps
881 hinfo_to_cinfo(mraid_hba_info_t *hinfo, mcontroller_t *cinfo)
883 if (!hinfo || !cinfo)
886 cinfo->base = hinfo->baseport;
887 cinfo->irq = hinfo->irq;
888 cinfo->numldrv = hinfo->num_ldrv;
889 cinfo->pcibus = hinfo->pci_bus;
890 cinfo->pcidev = hinfo->pci_slot;
891 cinfo->pcifun = PCI_FUNC(hinfo->pci_dev_fn);
892 cinfo->pciid = hinfo->pci_device_id;
893 cinfo->pcivendor = hinfo->pci_vendor_id;
894 cinfo->pcislot = hinfo->pci_slot;
895 cinfo->uid = hinfo->unique_id;
900 * mraid_mm_register_adp - Registration routine for low level drivers
901 * @lld_adp : Adapter object
904 mraid_mm_register_adp(mraid_mmadp_t *lld_adp)
906 mraid_mmadp_t *adapter;
913 if (lld_adp->drvr_type != DRVRTYPE_MBOX)
916 adapter = kzalloc(sizeof(mraid_mmadp_t), GFP_KERNEL);
922 adapter->unique_id = lld_adp->unique_id;
923 adapter->drvr_type = lld_adp->drvr_type;
924 adapter->drvr_data = lld_adp->drvr_data;
925 adapter->pdev = lld_adp->pdev;
926 adapter->issue_uioc = lld_adp->issue_uioc;
927 adapter->timeout = lld_adp->timeout;
928 adapter->max_kioc = lld_adp->max_kioc;
929 adapter->quiescent = 1;
932 * Allocate single blocks of memory for all required kiocs,
933 * mailboxes and passthru structures.
935 adapter->kioc_list = kmalloc_array(lld_adp->max_kioc,
938 adapter->mbox_list = kmalloc_array(lld_adp->max_kioc,
941 adapter->pthru_dma_pool = dma_pool_create("megaraid mm pthru pool",
943 sizeof(mraid_passthru_t),
946 if (!adapter->kioc_list || !adapter->mbox_list ||
947 !adapter->pthru_dma_pool) {
949 con_log(CL_ANN, (KERN_WARNING
950 "megaraid cmm: out of memory, %s %d\n", __func__,
959 * Slice kioc_list and make a kioc_pool with the individiual kiocs
961 INIT_LIST_HEAD(&adapter->kioc_pool);
962 spin_lock_init(&adapter->kioc_pool_lock);
963 sema_init(&adapter->kioc_semaphore, lld_adp->max_kioc);
965 mbox_list = (mbox64_t *)adapter->mbox_list;
967 for (i = 0; i < lld_adp->max_kioc; i++) {
969 kioc = adapter->kioc_list + i;
970 kioc->cmdbuf = (uint64_t)(unsigned long)(mbox_list + i);
971 kioc->pthru32 = dma_pool_alloc(adapter->pthru_dma_pool,
972 GFP_KERNEL, &kioc->pthru32_h);
974 if (!kioc->pthru32) {
976 con_log(CL_ANN, (KERN_WARNING
977 "megaraid cmm: out of memory, %s %d\n",
978 __func__, __LINE__));
982 goto pthru_dma_pool_error;
985 list_add_tail(&kioc->list, &adapter->kioc_pool);
988 // Setup the dma pools for data buffers
989 if ((rval = mraid_mm_setup_dma_pools(adapter)) != 0) {
993 list_add_tail(&adapter->list, &adapters_list_g);
1002 pthru_dma_pool_error:
1004 for (i = 0; i < lld_adp->max_kioc; i++) {
1005 kioc = adapter->kioc_list + i;
1006 if (kioc->pthru32) {
1007 dma_pool_free(adapter->pthru_dma_pool, kioc->pthru32,
1014 kfree(adapter->kioc_list);
1015 kfree(adapter->mbox_list);
1017 dma_pool_destroy(adapter->pthru_dma_pool);
1026 * mraid_mm_adapter_app_handle - return the application handle for this adapter
1027 * @unique_id : adapter unique identifier
1029 * For the given driver data, locate the adapter in our global list and
1030 * return the corresponding handle, which is also used by applications to
1031 * uniquely identify an adapter.
1033 * Return adapter handle if found in the list.
1034 * Return 0 if adapter could not be located, should never happen though.
1037 mraid_mm_adapter_app_handle(uint32_t unique_id)
1039 mraid_mmadp_t *adapter;
1043 list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) {
1045 if (adapter->unique_id == unique_id) {
1047 return MKADAP(index);
1058 * mraid_mm_setup_dma_pools - Set up dma buffer pools per adapter
1059 * @adp : Adapter softstate
1061 * We maintain a pool of dma buffers per each adapter. Each pool has one
1062 * buffer. E.g, we may have 5 dma pools - one each for 4k, 8k ... 64k buffers.
1063 * We have just one 4k buffer in 4k pool, one 8k buffer in 8k pool etc. We
1064 * dont' want to waste too much memory by allocating more buffers per each
1068 mraid_mm_setup_dma_pools(mraid_mmadp_t *adp)
1075 * Create MAX_DMA_POOLS number of pools
1077 bufsize = MRAID_MM_INIT_BUFF_SIZE;
1079 for (i = 0; i < MAX_DMA_POOLS; i++){
1081 pool = &adp->dma_pool_list[i];
1083 pool->buf_size = bufsize;
1084 spin_lock_init(&pool->lock);
1086 pool->handle = dma_pool_create("megaraid mm data buffer",
1087 &adp->pdev->dev, bufsize,
1090 if (!pool->handle) {
1091 goto dma_pool_setup_error;
1094 pool->vaddr = dma_pool_alloc(pool->handle, GFP_KERNEL,
1098 goto dma_pool_setup_error;
1100 bufsize = bufsize * 2;
1105 dma_pool_setup_error:
1107 mraid_mm_teardown_dma_pools(adp);
1113 * mraid_mm_unregister_adp - Unregister routine for low level drivers
1114 * @unique_id : UID of the adpater
1116 * Assumes no outstanding ioctls to llds.
1119 mraid_mm_unregister_adp(uint32_t unique_id)
1121 mraid_mmadp_t *adapter;
1124 list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) {
1127 if (adapter->unique_id == unique_id) {
1131 list_del_init(&adapter->list);
1133 mraid_mm_free_adp_resources(adapter);
1138 "megaraid cmm: Unregistered one adapter:%#x\n",
1149 * mraid_mm_free_adp_resources - Free adapter softstate
1150 * @adp : Adapter softstate
1153 mraid_mm_free_adp_resources(mraid_mmadp_t *adp)
1158 mraid_mm_teardown_dma_pools(adp);
1160 for (i = 0; i < adp->max_kioc; i++) {
1162 kioc = adp->kioc_list + i;
1164 dma_pool_free(adp->pthru_dma_pool, kioc->pthru32,
1168 kfree(adp->kioc_list);
1169 kfree(adp->mbox_list);
1171 dma_pool_destroy(adp->pthru_dma_pool);
1179 * mraid_mm_teardown_dma_pools - Free all per adapter dma buffers
1180 * @adp : Adapter softstate
1183 mraid_mm_teardown_dma_pools(mraid_mmadp_t *adp)
1188 for (i = 0; i < MAX_DMA_POOLS; i++) {
1190 pool = &adp->dma_pool_list[i];
1195 dma_pool_free(pool->handle, pool->vaddr,
1198 dma_pool_destroy(pool->handle);
1199 pool->handle = NULL;
1207 * mraid_mm_init - Module entry point
1214 // Announce the driver version
1215 con_log(CL_ANN, (KERN_INFO "megaraid cmm: %s %s\n",
1216 LSI_COMMON_MOD_VERSION, LSI_COMMON_MOD_EXT_VERSION));
1218 err = misc_register(&megaraid_mm_dev);
1220 con_log(CL_ANN, ("megaraid cmm: cannot register misc device\n"));
1224 init_waitqueue_head(&wait_q);
1226 INIT_LIST_HEAD(&adapters_list_g);
1233 * mraid_mm_exit - Module exit point
1238 con_log(CL_DLEVEL1 , ("exiting common mod\n"));
1240 misc_deregister(&megaraid_mm_dev);
1243 module_init(mraid_mm_init);
1244 module_exit(mraid_mm_exit);
1246 /* vi: set ts=8 sw=8 tw=78: */